Cat wrote:As I said before, there is no such thing as "equal cerebral health". Not even in twins - identical genetics + different epigenetics.

Banderi wrote:...there is nothing innate within the intellectual capability of a person like talents, inclinations or inherited abilities. All that forms the dispositions and the personality of an individual comes solely from their growth.

Best example to the contrary of what you are saying is when among twins one is right-handed and another is left-handed. Or do you think it is due to upbringing? Or is it another exception under elusive "equal cerebral health"?

That's just one example. There could be higher concordance rate of handedness among identical twins than among fraternal twins. Twin studies on even the most culturally unique variables usually estiamte that about 30% of our variability is due to genetic variability.

In my opinion, inherit part and environment are all needed for talents. Inherit part contribute the physical fundamental for talents. And environment determine whether the "talents" could become real talents.

Remember the brain can learn anything to near perfect performance after enough practice, though some people are born with a varying degree of talent which develop at a faster rate than a non-talented person, however if the non-talented person practices much harder, they can become better than the talented person. So it's more of how hard you work.

Everyone has a brain that can become finely tuned to whatever it's trained on and that can give the appearance of talent. Is an acting families daughter really born with talent or the product of her environment, from years of training acting as a child?

There's variances and multiple answers to your question, but it is a mystery that I like to think about it!